Kernel modules can be installed, loaded, and run without a reboot in Linux. TPM support would just ensure that the firmware/kernel and modules loaded at boot are expected.

Edit: basically, TPM support wouldn’t really do what a game dev would want for a kernel that can be modified at runtime, unless I’m missing something

Ah yes, because the left wing is famous for the proliferation of requiring a government issued ID to use the internet in ways that make them uncomfortable.